I tried doing the first stage of this mod to a 225 CPU yesterday (just swapping the core for a 300), but it didn't work (red light).Any gotchas I might have missed? Put the 225 core back, still a red light. Rats...

I have a 250 I can try, but don't want to until I have some idea of where I went wrong. Note that I checked with a 2nd 300 core,same result.

I didn't do any soldering. I mean I just did the first stage only, ie. swapping the CPU core, which should result(am I right?) in an R12K/225, but it didn't work, just gave a red light. Tried a second core from an Octane/300CPU, same result.

Putting the R10K core back in, still a red light. Worked ok before the swap attempt. Something gone fubar...

mapesdhs wrote:I didn't do any soldering. I mean I just did the first stage only, ie. swapping the CPU core, which should result(am I right?) in an R12K/225, but it didn't work, just gave a red light. Tried a second core from an Octane/300CPU, same result.

Putting the R10K core back in, still a red light. Worked ok before the swap attempt. Something gone fubar...

I can't think of any other details that would be relevant.

Ian.

Ahh, the red light. Unless the PM is baffed itself, check the compression pins in the connector socket. It's not so much that the pins work loose or misalign, but its fairly easy to gunk up one of the contact surfaces, or have a miscellaneous bit fall into the socket and cause contact problems. The R12k-300 should have worked fine, as should the original R10k-225, they have the same voltage requirements.

<> x2+ x3 x2 x2+ x2 x3 x2+

Once you step up to the big iron, you learn all about physics, electrical standards, and first aid - usually all in the same day

Does anyone have a copy of NeZetiC's images/article? Looks like his domain is gone byebye.

Ian.

I'm working on a charitable PC build for the Learn Engineering YouTube channel. Please PM/email/call if you'd like to contribute! Donations of items I can sell to provide funds are also welcome.mapesdhs@yahoo.com+44 (0)131 476 0796+44 (0)7434 635 121